In English The Moon is its proper name.
A small planetary satellite gravitationally bound to it's primary is called a moon.
So still i'm curious why in the game they preffered to adopt the latin version of their names,,, even if i admit i like it
That's kinda my point. Just English and other Germanic languages use moon (and variations thereof). The game is so far in the future that I feel we would be going more by Latin names than English ones. It feels a bit antiquate/pompous to still use Moon. I get that the game is localised. But we call our sun Sol, so I figured Luna or Selene would eventually be adopted too.
Bah. Any name that starts with "The", I'm not buying into.
You have discovered that English is not just a living language but a thriving language, and part of that means that it not only borrows from all sorts of other languages, living, dead, and invented from nothing, but incorporates them into use however it sees convenient at the time. No word is casually thrown out. Better to swell the dictionary by a factor of ten than to discard one very uncommonly spoken word, because those are the gems that make a speaker sound smart at dinner parties.
The fault is our language, sir.